What does this error log mean?

[Joe]

Maxim Dounin wrote:
> Hello!
>
> On Sun, Jan 20, 2008 at 09:03:27PM +0800, Joe wrote:
>
>> Hi all
>> I installed Nginx 0.5.34 on FreeBSD 6.2 (AMD) as a load balance, and 
>> I defined the error log like:
>>
>> error_log  /home/nginx/logs/crit_error.log  crit;
>>
>> Today, I find the following error info from this error log file:
>>
>> 2008/01/20 20:46:46 [error] 2233#0: accept() failed (53: Software 
>> caused connection abort) while accepting new connection on 0.0.0.0:80
>> 2008/01/20 20:47:39 [error] 2233#0: accept() failed (53: Software 
>> caused connection abort) while accepting new connection on 0.0.0.0:80
>> 2008/01/20 20:53:15 [error] 2219#0: accept() failed (53: Software 
>> caused connection abort) while accepting new connection on 0.0.0.0:80
>> 2008/01/20 20:54:33 [error] 2219#0: accept() failed (53: Software 
>> caused connection abort) while accepting new connection on 0.0.0.0:80
>> 2008/01/20 20:54:56 [error] 2219#0: accept() failed (53: Software 
>> caused connection abort) while accepting new connection on 0.0.0.0:80
>> 2008/01/20 20:55:35 [error] 2219#0: accept() failed (53: Software 
>> caused connection abort) while accepting new connection on 0.0.0.0:80
>> 2008/01/20 20:56:11 [error] 2215#0: accept() failed (53: Software 
>> caused connection abort) while accepting new connection on 0.0.0.0:80
>>
>> The number 2233,2219 should be the PIDs, what does the number 53 mean 
>> here? and what's the root cause which will trigger this kind of error?
>
> http://www.sysoev.ru/nginx/docs/faq.html (in russian)
>
> This is non-critical error caused by client closed connection befor 
> nginx accept()'ed it. Number 53 here is error number, see errno(2) 
> manpage for details.
>
> Maxim Dounin
>
>

Hi Dounin
Thanks for your answer.

Today, I find the following kind of error:
2008/01/21 12:59:45 [alert] 13288#0: *27192854 socket() failed (55: No 
buffer space available) while connecting to upstream, client: ......
2008/01/21 12:59:45 [alert] 13288#0: *27192754 socket() failed (55: No 
buffer space available) while connecting to upstream, client: ......
2008/01/21 12:59:45 [alert] 13288#0: *27193191 socket() failed (55: No 
buffer space available) while connecting to upstream, client: ......

Do you know what's the number 27192854, 27192754, 27193191 mean? also 
what does 'No buffer space available' mean? does it mean my server has 
no enough memory or any others?

BTW, where can I get the detailed error info description document? I 
searched the Nginx official Wiki page, but I still cannot find it.

Your help is really appreciated!


Thanks
Joe

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